Ph diagram representation of a dry refrigeration cycle. Simple gas plant attendees will work through a method to determine the optimal combination of refrigeration and jt. The power consumption comes from the compressors and seawater pumps, as calculated by hysys software. Performance evaluation of refrigeration units in natural gas. Add and connect operations to construct a simple flow sheet. In this case study, a propane refrigeration loop is. Introduction to hysys simulation software and its functions. Refrigeration basics and lng university of oklahoma. The design of a chemical plant using hysys simulation program. A propane refrigeration loop will be used to provide the chilling duty.
The continuous absorption type of cooling unit is operated by the application of a limited amount of heat furnished by gas, electricity or kerosene. The vapor compression refrigeration cycle is the most common method used for removing heat from a lower temperature level to a higher temperature level using a mechanical work. Here is the technical data on how gas or heating elementdriven absorption systems cool your lp fridge or freezer. The process consists of a refrigeration compressor, refrigeration condenser. The process flow diagrams for the simple and with flash economizer refrigeration systems are shown in. Improvement of loop performances by addition of an intermediate expansion. Execute flash calculations in aspen hysys attach stream utilities understand the color scheme employed by aspen hysys. The process utilizes a closed propane refrigeration loop green streams around a brazed plate fin heat exchanger. The amount of energy depends on the quantity of heat to be pumped chiller duty.
The production of propane is through fractionation of ngl. Propane refrigeration is a type of compression refrigeration. If an expander had been used the line from d to a would be a vertical line. Enerflex offers a wide range of refrigeration capacities, from. Course outline hysys simulation training in nigeria. Condenser outlet temperature streem 2 55 c condenser outlet vapours fr streem 20 chiller in pressure streem 8 0. That means offering ontarget products and services, maximizing profit margins and recognizing opportunities for growthall this while providing excellent customer service. Performance evaluation of refrigeration units in natural. The refrigeration plant is a simple propane refrigeration loop built within a subflowsheet for ease of visualization. The refrigeration cycles can also be represented in a ph diagram.
Learn aspen hysys at your own convinent time and place. Propane r290 has been used successfully in industrial refrigeration for many years, and is emerging as an increasingly viable alternative for homes and businesses. Wet refrigeration cycle the expander has been substituted by a throttling valve. Optimization of the aforementioned system is performed for two. Ludwigs applied process design for chemical and petrochemical plants, volume 3, fourth edition is a true applicationdriven book. Refrigeration loop with economizer in hysys posted in chemical process simulation. The continuous absorption type of cooling unit is operated by the application of a limited amount. Optimization of propane precooled mixed refrigerant lng. Aspen hysys training process simulation training course.
The details of a simple singlestage refrigeration system and a twostage refrigeration system employing one flash tank economizer are given in chapter 16 of gas conditioning and processing, volume 2 1. Introduce mathematical operations, starting with the balance and adjust. Micropipe and microcalc are currently our main products. Course module basic 2 dimensional drawing working on x,y coordinates getting familiarize with 2 dimensional tool. Refrigeration loop with economizer in hysys chemical. The objective function of the mcr cycle optimization and propane cycle optimization is to reduce the total power consumption of the apci lng plant. The propane refrigeration loop can operate with an unspecified circulating propane flowrate, as it is a closed loop the flow among c07 and the flow of c exit are equal. Experienced engineering consultants, with an extensive knowledge of the subject, design all of our products. Propane r290 has been used successfully in industrial refrigeration for many years, and is emerging as an. Propane cycle optimization resulted in a savings of 17.
Tutorial 2 refrigeration cycle chen 470 chemical process. The initial gas mixture methane and lpgs is sent in a twophase separator s101 in order to eliminate the heaviest compounds which are sent to the distillation column c101. This software is suitable for drafting and modeling. The optimum composition of refrigerant mixture obtained was compared with two optimized compositions of refrigerant mixtures from the open literature.
Simple gas plant attendees will work through a method to determine the optimal combination of refrigeration and jt based on a given inlet and product specification. Understand forwardbackward information propagation in hysys. Process structure and parameters given process inputs given process outputs unknown fig. Illustration of the results on phase envelope diagram. Introduce the hysys oil manager and the oil characterization process. Use the graphic interface to manipulate flow sheet objects and provide a clearer representation of the process. It provides clarity and easy access to essential process plant data and design information.
Use the case study feature to run flowsheetwide scenarios. Simulation of a propane refrigeration loop ludwigs applied. In this study, all of the simulations were performed by hysys software 2. The minimum approach temperature within the chiller will be 10f. Use graphical interface to manipulate flowsheets in hysys. In order to set the flowrate of propane circulating in the loop it is necessary to initialize one of the streams of the loop, here the stream.
Use of propane enthalpy diagram to validate the software. Module 2 propane refrigeration loop add and connect unit to build a flowsheet understand forwardbackward information propagation in aspen hysys convert a case to a template. Effect of impurities on propane refrigeration system. Learn aspen hysys at your own convinent time and place complete video tutorial by loyem2008. Therefore, propane as the working fluid has normally a small fraction of ethane and butanes. The model in hysys is treated as a black box in this optimization study. A simple model of propane refrigeration loop is used to create a steady state simulation using aspen hysys 7.
Hello dear all, i am currently work with refrigeration propane loop in hysys. The objective of a refrigeration system is to pump low temperature heat from the process fluid to high temperature ambient where it is rejected to the environment. Choosing a backup generator plus 3 legal house connection options transfer switch and more duration. By having a valid data from the propane loop, a simulation can be continued by replacing composition from propane to carbon dioxide. To learn more about the basics of the hysys interface, see chapter 1 interface in the user guide. Boanerges energy limited software training overview facebook. The process flow diagrams for the simple and with flash economizer refrigeration systems are shown in figure 1.
Designed the flowsheet of propane refrigeration loop in aspen hysys performed the steady state simulation using peng robinson package to obtain the process parameters performed the. Then a coded genetic algorithm from matlab software is linked to hysys software to optimize the propane mixed refrigerant process. Propane refrigeration loop fundamentals attendees will add and optimize a propane loop onto their refrigeration plant. Lpg recovery process using refrigeration loop simulation and. U k based white rose software specialises in the research and development of engineering design software for the refrigeration industry. Tejan patel student fundraiser purdue university linkedin. A simple approach to calculateminimize the refrigeration. White rose software refrigeration system design software.
Is the basic engineering software, which all beginners in field of engineering and science need to get acquitted to. Using the spread sheet to calculate the cop coefficient of performance for the loop. Learn to build, navigate and optimize process simulations using simulation software learn to evaluate the performance of existing equipment the course shall cover the below modules getting started module propane refrigeration loop refrigerated gas plant ngl fractionation train oil characterization gas gathering. Enerflex refrigeration systems are utilized around the world providing efficient cooling for a variety of applications beyond gas processing, such as co 2 scrubbing in clean coal power generating facilities. Process modeling using hysys propane refrigeration loop propane refrigeration loop 2005 aspentech. Define and analyze a vacuum tower with heat integration. Oct 16, 20 propane refrigeration loop diamond cube demo. Optimization of propane precooled mixed refrigerant lng plant. Refrigeration systems are commonly found in the petroleum refining and gas processing industries, and refrigeration is employed to cool a gas to meet a hydrocarbon dewpoint specification and to produce a marketable liquid. The propane enters the cooler at 25 c, 300 kpa, and kgmoleh, and the pressure drop across the cooler is 15 kpa.
Refrigeration with flash economizer vs simple refrigeration. Understand how to simulate the vapour compression loop. Chemical process design tutorial assignment 2 figure 1 depicts a process in which a stream of propane 5 is cooled from 25 c to 5 c using a refrigeration cycle. The simulation of process units in propane refrigeration cycle involves the applications of thermodynamics principles to the following. Getting started with aspen hysys, aspen hysys simulations, oil characterization, ngl fractionation, propane refrigeration loop, select a property package to define a fluid package, gas gathering system. Mechanical refrigeration, propane refrigeration loop, hysys simulation, lpg recovery, ngl processing.
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